It is a Model 29 Remington Full choke, takedown shotgun.
2 3/4 shell serial 14xxx, It has a few markings that I don't know what they are.
It is 95% blue.

Original carry case.

My question's are,
Can I ever shoot this gun even once just cause I really want to.
If yes What kind of ammo. Modern? Cowboy? or Special made loads?
This shotgun comes in a few different Grades-http://www.remington.com/products/ar.../model-29.aspx,
How do I find out which grade.
it is?
How do I find out when it was made.

It's my understanding, although the custom shop may have offered guns up to the elaborate F-Grade, typically the Model 29's were standard or target models. The 29T (Trap) had a 32-inch barrel with a rib. Yours seems to be a plain barrel standard model.

That is all good info thank you very much..
I am still curious if there is anyway to know for sure the differences between the grades... I am positive it is not a 29T target as the stock is curved on mine, also the barrel is too short.. its 30''.
"If your bore is not heavily pitted from neglect"
The bore does not looked pitted, But it has a bit of dust and a Tiny tiny bit of rust..
Any suggestions on what gun cleaning kit to buy for this gun?
Will solvents hurt it?
Thanks again.

Get a traditional shotgun cleaning kit. It'll have a three section rod w/ multiple tips, solvent, gun oil, brushes, swabs and wipes. If there are areas of light rust, you can use a polishing cream like Flitz.

Do not feed your Model 29 a steady diet of high-pressure shells, it will batter the action and loosen it up. This is a common problem with many old take-down pump shotguns. Until after WW2, shotgun shells were still loaded to black powder pressures in deference to the old BP shotguns still common.

I don't think the learned Scorch was suggesting that you get special loads; but, he's cautioning you to avoid a steady diet of heavy loads. You'll be okay with standard 2-3/4 dram equivalent target and game loads.

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